138 lines
4.1 KiB
C#
138 lines
4.1 KiB
C#
using System;
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using UnityEngine;
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using UnityEngine.EventSystems;
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// 为避免潜在的冲突和更清晰的逻辑，建议将类名稍作更改，以反映其新功能
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// 例如：UIMouseBlocker，或者就保持 UIBlockCameraDrag 也可以，只要功能上能理解
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public class UIBlockCameraDrag : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler, IPointerDownHandler, IPointerUpHandler
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{
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private const float DragThresholdPixels = 10f;
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public static bool IsPointerOnUI = false;
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public static bool ShouldBlockDrag = false;
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public static bool MoveEvent = false;
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public static bool DownUpEvent = false;
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public static Vector3 PointerDownScreenPosition;
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public static Vector3 ClickScreenPosition;
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public static Vector3 DragOrigin;
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public static Vector3 MoveVector;
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private static UIBlockCameraDrag _activeBlocker;
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private bool _isPointerInside;
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//是否ban点击
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public bool BanClick = false;
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public static void ResetState()
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{
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IsPointerOnUI = false;
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ShouldBlockDrag = false;
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MoveEvent = false;
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DownUpEvent = false;
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PointerDownScreenPosition = Vector3.zero;
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ClickScreenPosition = Vector3.zero;
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DragOrigin = Vector3.zero;
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MoveVector = Vector3.zero;
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_activeBlocker = null;
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}
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private static Vector3 GetMouseWorldPosition()
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{
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var mainCamera = Camera.main;
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return mainCamera == null ? Vector3.zero : mainCamera.ScreenToWorldPoint(Input.mousePosition);
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}
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private void ClearDragState()
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{
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if (_activeBlocker != null && _activeBlocker != this)
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return;
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if (_activeBlocker == this)
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_activeBlocker = null;
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ShouldBlockDrag = false;
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MoveEvent = false;
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DragOrigin = Vector3.zero;
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MoveVector = Vector3.zero;
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}
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public void OnPointerEnter(PointerEventData eventData)
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{
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_isPointerInside = true;
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IsPointerOnUI = true;
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}
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public void OnPointerExit(PointerEventData eventData)
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{
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_isPointerInside = false;
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IsPointerOnUI = false;
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ClearDragState();
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}
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public void OnPointerDown(PointerEventData eventData)
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{
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if (eventData.button == PointerEventData.InputButton.Left)
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{
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// OnPointerEnter may be missed after reconnect/reset if the cursor is already on this raycast target.
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_isPointerInside = true;
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IsPointerOnUI = true;
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_activeBlocker = this;
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ShouldBlockDrag = true;
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MoveEvent = false;
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PointerDownScreenPosition = eventData.position;
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ClickScreenPosition = PointerDownScreenPosition;
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DragOrigin = GetMouseWorldPosition();
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MoveVector = Vector3.zero;
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}
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}
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public void OnPointerUp(PointerEventData eventData)
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{
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if (eventData.button == PointerEventData.InputButton.Left)
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{
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if ((_activeBlocker == this || _isPointerInside) && !MoveEvent && !BanClick)
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{
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ClickScreenPosition = PointerDownScreenPosition;
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DownUpEvent = true;
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}
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IsPointerOnUI = _isPointerInside;
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ClearDragState();
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}
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}
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private void OnDisable()
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{
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_isPointerInside = false;
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if (_activeBlocker == this)
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ResetState();
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}
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public void Update()
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{
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if (ShouldBlockDrag)
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{
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if (!MoveEvent)
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{
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var screenDelta = (Vector2)Input.mousePosition - (Vector2)PointerDownScreenPosition;
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if (screenDelta.magnitude <= DragThresholdPixels)
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{
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MoveVector = Vector3.zero;
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return;
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}
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MoveEvent = true;
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DragOrigin = GetMouseWorldPosition();
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MoveVector = Vector3.zero;
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return;
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}
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MoveVector = DragOrigin - GetMouseWorldPosition();
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if (MoveVector.sqrMagnitude <= Mathf.Epsilon)
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{
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MoveVector = Vector3.zero;
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}
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}
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}
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}
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